Improvement in machines for sandpapering moldings



UNITED STATES PATENT OFFICE.

JOSEPH BARKER, OF CHICAGO, ILLINOIS, ASSIGNOR TO HIMSELF AND PHILIPMYERS, OF SAME PLACE.

IMPROVEMENT IN MACHINES FOR SANDPAPERING MOLDINGS.

Specification forming part of Letters Patent N0. 106,536, dated August23, 1870.

To all 'whom it may concern.-

Be it known that I, JOSEPH BARKER, of Chicago, in the county of Cook andState 0t` Illinois, have invented a Machine for Sandpapering Moldings;and I do hereby declare that the following is a full and exactdescription thereof, which will enable those skilledin the art to makeand use the same, reference y being had to the accompanying drawing andletters marked thereon, making' a part of this specification, in whichthe tlgure is a perspective representation of mechanism in which isarranged my invention.

The present invention relates to a machine which is arranged to operatea sandpaperingblock patented by me May 3, 1870; and its nature will befully understood by the following description.

Arepresents a substantial frame which supports the mechanism of mydevice, said frame being conveniently arranged for that, purpose.

Ll is the main drive feed-wheel of the mechanism, over which runs a beltfor giving motion to cranks Gr, so that when said cranks turn acog-gear, V, will rotate an elastic roller, U, and carry a molding, a,under the sandpapering-block E as said molding` is being iin.- ished.

The means for giving the block E a reciprocating motion consists otA aband-wheel, L, on a shaft which carries a belt, I, running over a Wheel,2. On the shaft ot said wheel L are two cranks, Gr, which driveconnecting-rods A. These rods support a pressing and driving rod, C,which tits into a groove or notch Vin the block E and gives it areciprocating motion on a molding, a.

In order tb hold the moldingin position as it is being put through themachine in rear ot' the block E, a roller, F, held by suitable springs,B, is arranged for that purpose. v

To give suitable pressure on the block E connecting-rods N and elasticstraps V are used, and to give proper tension to said straps they areconnected to a hinged platform, X, so that when a lever, Q, attached tosaid platform, is moved in the direction of dart 6 the pressure will beincreased on the block E and cause it to bear with more force on themolding a.

In order to control the speed with which the molding shall move underthe block E, the ordinary conical compensating rollers, Z Z', areemployed, and to ship the belt b, which runs over them, levers d j areused, carrying loops K a, which move the belt h to any desired positionon the conical rollers. Thelower lever, j, has a guide bearing on vtworods,fj`, which pass through upright standards e, so that the levers d jmay have a free lateral motion to transfer the belt from the ends ofrollers Z Z at one side ot' the machine to the other, and thus increaseor diminish the speed which the molding a is to have under the aforesaidblock E.

K represents a brush, which is fixed to the same shaft that drives thecranks Gn, and which is used to remove what dust is caused by the blockE, and by means of two pulleys, L, the brush may be run ineitherdirect'ion, as the case may require.

By means ot' the above-described machine the block E is made to have asuitable recip rocating movement over the molding a with such pressureas is necessary to tinish it preparatory to a varnish or oil finish,while at the same time the work is done at small cost.

' I claiml. The connecting-rods A, rod C, and crank G, in combinationwith rods N, elastic straps, V, and hinged frameX and level-Q, as setforth.

2. The combination of co nical rollers Z, shipping-levers d. j, rods ff,standards e, gearing c b s, and feed-roller U for carrying a moldingunder the block E, as set forth.

JOSEPH BARKER.

Witnesses:

E. E. GIBSON, Gr. L. GHAPTN.

